Practice Questions

TLS Online TPP Program

#Question id: 14267

In a trickling biological filter, the BOD value of the feed stream is S_0i = 500 mg/l with a feed flow of F = 10³ l/h. The effluent BOD value is desired to be S₀ = 10 mg/l. The following kinetic parameters for the biocatalysts are known: r_m = 20 mg/S/l .h and K_s = 200 mg S/l. The biofilm thickness is L = 0.1 mm. The cross-sectional area of the filter is A = 2 m² , and the biofilm surface area per unit volume of the bed is a = 500 cm² /cm³ . Assume that dissolved oxygen is the rate-limiting substrate and the diffusion coefficient of oxygen is D_O2 = 2 × 10^-5 cm² /s. Determine the required height of the bed. You can assume first-order bioreaction kinetics?

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#Section 5: Bioprocess Engineering and Process Biotechnology

More Questions

#Question id: 4318

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following statements correctly describes a characteristic of tumor-suppressor gene?

#Question id: 14768

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

#Question id: 3774

#Section 3: Genetics, Cellular and Molecular Biology

Use the figure to answer the following question. Referring to the figure, what bases will be added to the primer as DNA replication proceeds?

#Question id: 78

#Section 2: General Biology

Which is true about naturally occurring monosaccharides?

#Question id: 15920

#Section 6: Plant, Animal and Microbial Biotechnology